Plasma display device having a thin dielectric substrate

Details Plasma display device having a thin dielectric substrate Plasma display device having a thin dielectric substrate

1999-01-13

2003-02-18

Day, Michael H. (Department: 2879)

Electric lamp and discharge devices

With gas or vapor

Three or more electrode discharge device

C313S584000, C313S587000, C313S491000

Reexamination Certificate

active

06522074

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a plasma display device, and more particularly, to a plasma display device having improved structures of a front substrate and a dielectric layer.
2. Description of the Related Art
A plasma display device forms an image by exciting fluorescent material using ultraviolet rays generated by discharging the gas filled between two substrates disposed to face each other where a plurality of electrodes are formed.
FIG. 1
is a perspective view of an example of a conventional plasma display device of a surface discharge type. Referring to the drawing, a dielectric layer
13
is formed on an upper surface of a rear substrate
11
and an address electrode
12
in a striped pattern is embedded in the dielectric layer
13
. A partition
14
for defining a discharge space is formed on an upper surface of the dielectric layer
13
. A front substrate
15
is installed above the partition
14
. A common electrode
16
and a scan electrode
17
, both in striped patterns, are formed under a lower surface of the front substrate
15
to cross with the address electrode
12
. The common electrode
16
and the scan electrode
17
are provided with bus electrodes
16
a
and
17
a
for reducing line resistance. A dielectric layer
18
is formed under the lower surface of the front substrate
15
such that the common electrode
16
and the scan electrode
17
can be embedded. A protective layer
19
formed of MgO, for example, is formed on a lower surface of the dielectric layer
18
. A flourescent layer
20
is coated in a discharge space between the partitions
14
.
As described above, in the conventional plasma display device having the above structure, when a predetermined voltage is applied to the above electrodes, wall charges are filled inside the discharge space by a preliminary discharge between the address electrode
12
and the common electrode
16
. In this state, a maintenance discharge occurs between the common electrode
16
and the scan electrode
17
so that light is emitted.
In manufacturing the dielectric layer
18
of the above plasma display device, a paste formed of material for the dielectric layer
18
is printed on the lower surface of the front substrate
15
where the electrodes
16
and
17
are formed and then the printed paste is dried and cured two or three times. As a result, the steps for forming the dielectric layer increase and additional equipments should be provided therefor. Also, bubbles or foreign material can be generated or included in the dielectric layer during the step of coating the dielectric layer
18
and it is not easy to coat the dielectric layer
18
to a uniform thickness. The uneven dielectric layer
18
can cause difference in voltage applied to the dielectric layer to lower operational reliability of the display. Further, the dielectric layer
18
lowers light transmittance with respect to the front substrate
15
and accordingly resolution of an image is lowered.
SUMMARY OF THE INVENTION
To solve the above problems, it is an objective of the present invention to provide a plasma display device which can reduce the man-hour needed for manufacturing the dielectric layer and improve brightness of an image.
Accordingly, to achieve the above objective, there is provided a plasma display device which comprises: a pair of substrates installed to face each other, at least one of the substrates being formed of a dielectric thin plate; a plurality of partitions for defining a discharge space formed between the substrates; and an electrode formed on an outer surface of the substrate which is formed of the dielectric thin plate.
According to another aspect of the present invention, there is provided a plasma display device which comprises: a rear substrate: a first electrode formed on an upper surface of the rear substrate in a striped pattern; a dielectric layer formed on the upper surface of the rear surface such that the first electrode is embedded therein; a plurality of partitions defining a discharge space formed on an upper surface of the dielectric layer; a front substrate installed above the partitions and formed of a transparent dielectric thin plate; and second and third electrodes formed on an upper surface of the front substrate to cross with the first electrode.


REFERENCES:
patent: 3509408 (1970-04-01), Holz
patent: 3935494 (1976-01-01), Dick et al.
patent: 4297613 (1981-10-01), Aboelfotoh
patent: 4803402 (1989-02-01), Raber et al.
patent: 5541479 (1996-07-01), Nagakubo
patent: 5701056 (1997-12-01), Shinohara
patent: 5957743 (1999-09-01), Konishi et al.
patent: 6160345 (2000-12-01), Tanaka

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